Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.
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with us with understanding what is going on behind the scenes inside object db. When you refer to having "30 open databases", are you talking about having 30 PersistanceManagers open? Or 30 PersistanceManagerFactories? Or ... Dev Team > When you refer to having "30 open databases", are you talking about having 30
dependencies are allowed without me having to know what is really required by what. You can see that my tool and approach is designed for "just me" to get true Java 9 without having to wait on third parties but at the sacrifice of having everything exposed (which is fine because I am the only one using
with the system which was created before having the OEM license and before adding enhancer to our maven ... is the same and it is not affected by having or not having a license. support Support
How Should I Configure objectdb.conf to Obtain 256KB Disk IO Requests and Maximize Shared PersistenceManager Entity Cache?
above) appropriate to achieve this goal? CBE CBE Having larger database pages may have other effects ... on an Amazon EBS disk which has max performance at that size and reduces monetary fees by having ... performance at that size and reduces monetary fees by having fewer accesses). So a page size of 256K
or the entity manager factory after having detached the entity, the detached entity finds ... is to make the irreducible basic elements as simple and as few as possible without having to surrender ... .” webel Dr Darren Kelly Having remarked on the ObjectDB JavaEE tutorials being too simple, it is worth
(select id from TTT s group id having count(id)>1) I dont know how to do this using JPQL, but I use ... #1 contains GROUP BY / HAVING. The outer query in #1 contains the IN operator. The query in #3 ... since in #3 there is no GROUP BY / HAVING. support Support
Given that the default seems to be FetchType.LAZY for all collections @OneToMany and @ManyToMany. Such as a configuration option. Instead of having to explicitly set fetch in annotation code in every relationship. webel Dr Darren Kelly No. There is no such configuration option, since having EAGER
: SELECT a FROM Account a GROUP BY a.code HAVING COUNT(a) < 2 It throws following exception: com ... Account a GROUP BY a.code HAVING COUNT(a) < 2 This is an invalid query. In a grouping query
Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)
of my time. Please attend to this as soon as possible and fix this carefully. I look forward to having this fixed and to having a robust ObjectDB working on my problem, as I am greatly encouraged by ... having performed a query in an EJB and having returned that from a JSF backing bean getter
Support I'm having trouble creating a simple test case that reproduces it. At this point, I think it may be related to having a class annotated with @Startup or @ApplicationScoped that references